Ignition Coil

Alright, more tests and now I have caught a small smoking gun that I think it might be.

Bike came with aftermarket ignition coil that was replaced with this one - www.amazon.com/gp/product/B014WWNHGK/ref...01_s00?ie=UTF8&psc=1

initial one and new one are reading .3 primary resistance.

Manual states much higher.

Electronic ignition, not points if that matters, I have heard electronic can run less than 4 ohms.

Replace the ignition coil? And with which one?

Thanks in advance.

No eBay APP ID and/or Cert ID defined in Kunena configurationNo eBay APP ID and/or Cert ID defined in Kunena configurationAmazon sells junk made in China
Japan coils are good -
These are good -

This is the one I got, that seems to be the problem - www.amazon.com/gp/product/B014WWNHGK/ref...01_s00?ie=UTF8&psc=1

.3 ohms is super low. Are you sure? Not 3 ohms? And what does your manual state? I don't know about the 440 but on my 750 the coils are supposed to be 1.8-2.8 ohms which is pretty low as far as '80s coils go.

.3 - 100% just triple checked it.
The secondary winding test registered correct, so I know the multimeter is working.

On the lowest scale, touching the leads together might give a reading of .3 ohms. Are you sure nothing is shorted in the wiring that you are testing?

Like Nessism said, .3 is extremely low. I was also going to ask if you meant 3 ohms, but he beat me to it.

At .3 ohms you will destroy the igniter pretty quickly. So don't even try to use that coil. Hopefully the igniter is still good.
Also, at .3 ohms, I would have expected a fuse to blow or the igniter to smoke or the coil to smoke.

Like Nessism said, your coil should be in that 1.8 to 2.8 range. The target value is 2.3 ohms and most tend to be in the 2.3 to 2.6 ohm range.

A 4 ohm coil would be for points.

Thats what I thought too! But I swear .3, I am ordering a new one tomorrow. Keep you posted.

The secondary test came out perfect, so I know the multimeter is set correctly.

And the coil should also cost more than $18.00. That price to me is a red flag.

Right?! That was my first red flag, but I took a shot anyways. I think thats my smoking gun, I have ordered the new one coming from Japan.

If anyone has one that can come faster I would be very appreciative.

Brand new NGK ignition. Still missfiring at 3500-4000.

Any guesses left on the table?

Buddy of mine says replace the carbs.

Maybe tell us what's been done to the carbs, and whether you have a stock intake and exhaust. Also, have you done a compression test and checked your valve clearance? Any photos of the carbs?

Sorry, I broke my initial thread and started this one, it was all included originally.

Stock air box, stock carbs, jets are all clean as a whistle, carb seals are all new and new diaphrams. Compression test done, it was a little on the low side but still within limits. Valves are done, battery has been tested with high beam test and load is showing 12.2

My initial smoking gun was the ignition coil being the wrong one but since being replaced its not the answer.

Last idea, the left side exhaust does not flow as strong as the right. (air to fuel mixture was taken back to zero and turned 2 and 1/4 turn out.) The right exhaust pipe hits my hand with exhaust puff leaving the pipe. The Left exhaust pipe has exhaust coming out but not with as much power, its a decent amount but weaker than the right.